[Mondo tips his head. Kirigiri does have a point and he can see that, but...]

If you hadn't figured it out, everyone else would've died. I dunno about Kuwata and Celes, but I know for a fact I couldn't live with that shit. So... no, I don't think you need to apologize. You had to do what was best for the group and yeah, it meant someone would have to die, but in the end, the murderer deserved it, right?